Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
30,407 
Well heres the question:
Find 'X' where 'AX = '
6
8
4
and 'A = '
1 2 4
3 1 2
0 2 4
Now i would go...

Apr1504 04:29 AM
matt grime

3 
1,620 
Have you seen this argument? If sqrt(2) = p/q is in lowest terms, then also 2/1 = p^2/q^2 is in lowest terms. Since...

Mar1205 06:21 PM
Hurkyl

11 
1,620 
hi,i got 2 question about vector spaces :
1. Do the set of all ntuples of real numbers of the form (x, x1...

Apr2705 04:18 AM
Data

8 
1,620 
Hey, i stumbled across a math problem thats got me stump and I was wondering if anyone can help me out. What we have...

Nov306 03:17 PM
thekeyboardbum

2 
1,620 
Say I have (a+b+c)^n and I want to split it apart into a^something + b^something + c^something. Is this easily done?

Nov1611 02:45 PM
mathman

1 
1,620 
Hi,
I have the following
\underset{\\mathbf{x}\^2=1}{\text{max...

Mar1412 02:24 AM
S_David

0 
1,619 
Dear All,
I have a linear system of equations such as Ax = b where A is a mbyn matrix and m < n and A is a full...

May2612 07:52 AM
algebrat

1 
1,619 
Suppose that M and N are natural numbers, such that N>M1.
Prove that N≥M
The problem above is a rather minor...

Nov1412 09:28 AM
Vargo

6 
1,619 
Hello!
This question may seem silly. I'm a first year engineering and computer science student, not a mathematics...

Feb1013 07:14 PM
LioNiNoiL

6 
1,619 
I have a trouble proving that a finate (nonzero) commutative ring with no zero divisors must have an identity with...

Oct2707 04:54 PM
morphism

1 
1,618 
Oh guys, I'm asking for explanations here, a little lesson.
If something could explain vector dot product...

Nov1007 07:25 AM
cristo

1 
1,618 
Hi guys!
I need to solve a matrix. I have 3 equations, 3 unknowns, straightforward stuff. And I know it's...

Oct1811 07:14 PM
jasonRF

3 
1,617 
Let G be the group of 2x2 invertible upper triangular matrices and H be the group of 2x2 invertible lower triangular...

Oct1010 06:26 PM
symbol0

4 
1,617 
I found in page 225 of this article
http://www.dm.unito.it/~cerruti/ac/schoofcounting.pdf
that the endomorphism...

Aug2311 09:13 AM
yavanna

0 
1,617 
Dummit and Foote Section 4.1 Group Actions and Permutation Representations, Exercise 4 (first part of exercise) reads:...

Oct2911 01:58 AM
Math Amateur

4 
1,616 
Hi. I need to find a base for the subspace V in R3 which has the equation
x+2y+3z=0
Can someone please tell my if...

Oct2404 01:07 PM
HallsofIvy

2 
1,615 
Ok, maybe a dumb question, but anyway:
if I have some matrices equation like this:
AB = BC
if I want to...

Apr2705 05:22 PM
EvLer

2 
1,615 
Apologies if this is in the wrong forum. :smile:
In a discussion we're having on our compsci forums at uni, about...

Aug2405 11:06 AM
serge

4 
1,615 
Does anyone know a theorm in number theory or mathematics that could be used to prove the following problem: Given a...

Sep908 10:18 AM
HallsofIvy

1 
1,615 
Question: Show the set of all differentiable functions on (infinity, +infinity) that satisfy f′ + 2f = 0 is a vector...

Mar512 09:34 AM
Fredrik

3 
1,615 
I know it may sound idiotic to ask questions about definition of something, but I'm gonna do that now. I've seen the...

May1912 10:56 AM
mathwonk

15 
1,615 
A graph can be represented by an adjacency matrix but how is that a real mathematical matrix and not just a table?
A...

Oct211 10:07 AM
AlephZero

3 
1,614 
I'm just learning linear algebra, where we are taking a set of basis vectors and then using gram schmidt to convert...

Apr810 06:53 PM
Live2Learn

2 
1,614 
I am weak in this topic but I am certain that the following is has a solution in integers A,B,C,D.
Find A,B,C and...

Jul908 01:09 AM
DeaconJohn

5 
1,613 
ok, i'm in first year coolege and we're doing some review from highschool work.. but i can't for the life of me...

Oct504 01:04 PM
Blissfulpain

5 
1,612 
I have 2 questions.
1)what is the remainder with 100! is divided by 103? explain your answer
2)a = 238000 =...

Mar1305 04:24 PM
Data

4 
1,612 
I am having a very hard time with a general concept of proving something. If I have some arbitrary function mapping...

Oct207 09:53 AM
mathwonk

4 
1,612 
Let V be the variety of the ideal (f)
a singular point is a point where all the partial derivatives of the f are...

Dec307 08:22 PM
mathwonk

4 
1,612 
Prove, that if
(m,n) = 1 // m and n are two different primes
then
(2m 1, 2mn 1/2m 1) = 1

Nov1910 08:40 PM
Bill Simpson

1 
1,612 
How to calculate following integral?:
{lim}_{t→∞}\int_{0}^{t} \exp (A(ts)) B B^{T} \exp (A^{T}(ts))ds
where...

Oct1411 11:17 AM
lequan

0 
1,612 
sorry im new and posted instead of previewing...im currently writing the post

May1611 09:26 AM
saulg

2 
1,612 
Is saying \existsx, \existsy
the same as saying \existsy, \existsx?

Jun1711 10:54 PM
gmmstr827

2 
1,612 
Hey folks,
I am trying to generate the Pauli matrices and am using the following formula taken from...

Jul2708 01:27 AM
vkroom

1 
1,611 
http://img3.imageshack.us/img3/8660/aassa.png
Who discover that?

May311 02:58 PM
coolul007

4 
1,611 
I am pretty rusty/unknowledgable when it comes to linear algebra, so when I was given the problem.
Find the limit...

Oct1304 05:45 AM
matt grime

1 
1,610 
A man cashes a cheque for d pounds and c pence at a bank. Assume that the teller by mistake gives the man c pounds and...

Mar804 04:59 AM
MathematicalPhysicist

2 
1,609 
Hi everybody,
In vector spaces we define two operations, addition and scalar multiplication. Scalar multiplication...

Feb1305 02:03 PM
mathwonk

2 
1,609 
if u have 3 primes: x,y,z
then prove its sum m=x+y+z is unique ? Thank you

Jun2206 06:56 PM
Mollet1955

8 
1,609 
http://secamlocal.ex.ac.uk/~mwatkins/zeta/NTfourier.htm
This is along the lines of what I have suspected about the...

Nov1706 04:06 PM
Karlisbad

7 
1,609 
I'm struggling with the meaning of inner products between vectors and covectors.
Consider dual space V^{\ast} of an...

Oct2911 10:04 AM
Wox

8 
1,609 